mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-07 20:17:37 +00:00
75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
|
||
|
|
* vim: set ts=8 sts=4 et sw=4 tw=99:
|
||
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
||
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
||
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
||
|
|
|
||
|
|
#ifndef js_ProfilingFrameIterator_h
|
||
|
|
#define js_ProfilingFrameIterator_h
|
||
|
|
|
||
|
|
#include "mozilla/Alignment.h"
|
||
|
|
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
#include "js/Utility.h"
|
||
|
|
|
||
|
|
class JSAtom;
|
||
|
|
struct JSRuntime;
|
||
|
|
namespace js { class AsmJSActivation; class AsmJSProfilingFrameIterator; }
|
||
|
|
|
||
|
|
namespace JS {
|
||
|
|
|
||
|
|
// This iterator can be used to walk the stack of a thread suspended at an
|
||
|
|
// arbitrary pc. To provide acurate results, profiling must have been enabled
|
||
|
|
// (via EnableRuntimeProfilingStack) before executing the callstack being
|
||
|
|
// unwound.
|
||
|
|
class JS_PUBLIC_API(ProfilingFrameIterator)
|
||
|
|
{
|
||
|
|
js::AsmJSActivation *activation_;
|
||
|
|
|
||
|
|
static const unsigned StorageSpace = 5 * sizeof(void*);
|
||
|
|
mozilla::AlignedStorage<StorageSpace> storage_;
|
||
|
|
js::AsmJSProfilingFrameIterator &iter() {
|
||
|
|
JS_ASSERT(!done());
|
||
|
|
return *reinterpret_cast<js::AsmJSProfilingFrameIterator*>(storage_.addr());
|
||
|
|
}
|
||
|
|
const js::AsmJSProfilingFrameIterator &iter() const {
|
||
|
|
JS_ASSERT(!done());
|
||
|
|
return *reinterpret_cast<const js::AsmJSProfilingFrameIterator*>(storage_.addr());
|
||
|
|
}
|
||
|
|
|
||
|
|
void settle();
|
||
|
|
|
||
|
|
public:
|
||
|
|
struct RegisterState
|
||
|
|
{
|
||
|
|
void *pc;
|
||
|
|
void *sp;
|
||
|
|
#if defined(JS_CODEGEN_ARM)
|
||
|
|
void *lr;
|
||
|
|
#endif
|
||
|
|
};
|
||
|
|
|
||
|
|
ProfilingFrameIterator(JSRuntime *rt, const RegisterState &state);
|
||
|
|
~ProfilingFrameIterator();
|
||
|
|
void operator++();
|
||
|
|
bool done() const { return !activation_; }
|
||
|
|
|
||
|
|
enum Kind {
|
||
|
|
Function,
|
||
|
|
AsmJSTrampoline
|
||
|
|
};
|
||
|
|
Kind kind() const;
|
||
|
|
|
||
|
|
// Methods available if kind() == Function:
|
||
|
|
JSAtom *functionDisplayAtom() const;
|
||
|
|
const char *functionFilename() const;
|
||
|
|
|
||
|
|
// Methods available if kind() != Function
|
||
|
|
const char *nonFunctionDescription() const;
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace JS
|
||
|
|
|
||
|
|
#endif /* js_ProfilingFrameIterator_h */
|